Nonrotary self-opening die head



Sept. 27.1927. 1,643,832

y A. F- BREITENSTEIN ET AL l NONROTARY SELF OPENING DIE HEAD Filed Jan.26 1926 3 Sheets-Sheet 2 wlhmmmmmmw Sept. 27. 1927. 1,643,832

A. F. BREITENSTEIN ET AL NONROTARY SELF OPENING DIE HEAD med Jan. ze1926 s sheets-sheet s Patented sept. 27, 1927.

UNITED STATES'PATENT OFFICE..

ALBERT F. BREITENSTEIN .ANDy ERWALD A. BARTEIT, OF NEW HAVEN, CONNECTI-CUT, ASSIGNORS TO THE GEOMETRIC TOOL CO., OF NEW HAVEN, CONNECTIGUT, A.

CORPORATION.

NONR-OTARY SELF-OPENING DIE .HEAD.

Application led January 26, 1926. Serial No. 83,780.

Fig. 1 is a View in side elevation of our improved die-head, shown asclosed.

Fig. 2 is a view thereof in front elevation.` Fig. 3 is a view thereofin vertical, central, 5 longitudinal section, as closed.

Fig. i is a similar View, with the .parts thereof in the positions dueto them when the fixture is about'to open.

Fig. is a corresponding view, as open. Fig. 6 is a broken, longitudinal,sectional view on the line G6 of Fig. Y Fig. 7 is a corresponding viewon the line 7-7 of Fig. 2. v

Fig. 8 is a corresponding view on the line 8 8 of Fig. 2. y

Fig. D is a detached view in front elevation of the locking-member ofthe fixture. 10 is an edge View thereof. 11 is a detached view, in frontelevation, of the operating-member of the fixture. Fig. 12 is a viewthereof in side elevation, partly in section.

Fig. 13 is a detached view,-in front eleva tion, of the adjusting-ringof the fixture.

14 is a view thereof 'in side elevation.I partly in section.

Fig. 15 is a detached view, in side elevation, of the Chaser-carryingmember of the fixture. i

Fig. 1G is a View thereof in rear elevation. Fig, 17 is a detached view,in front elevation, of the mounting-member of lthe fixture. Fig. 18 is aview thereof in side elevation, with its shank broken away. Ourinvention relates to an improvement in non-rotary, self-openingdie-heads, the object bein-g to produce a fixturev of the characterdescribed, constructed with particular reference to ruggedness anddurability in use, simplicity lof'operation, convenience of adjustment,positiveness of action, and accuracy of performance.

With these ends in view, our invention consists in a non-rotary',self-opening diehead characterized by having a mountingmember. aChaser-carrying member, chasers mounted therein, an operatingymember,and a locking-member located between the Chaser-carrying member and theoperatingmember. the said operatingand chasser-carrying members havingrelative, rectilinear movement with respect to each other and withrespect to the mounting-member, and the said locking-member beingreleasable for unlocking v)the die-head `by the forward draft imposedupon the chasers by the work.

Our invention further consists in a non` rotary, self-opening die-headcharacterizedl as ab,ove,and having certain other ldetails ofconstruction as will be pointed out -in the v claims. y

In carrying out our invention, as herein shown, we employ amounting-membery 20, a

Chaser-carrying member 21, an operatingmember 22, and a locking-member23. The said ymounting-member 20 has a hollow shank 24,' by means ofwhich the fixture is mounted in a turret 25, or the equivalent featureof any machine `suitable for threading operations.

At its forward end, the said mountingmember 20 is provided with aconcentric bore 26 for the sliding reception of the hollow shank 27 ofthe chaser-carrying member 21, the forward face of which is providedwith four radially-arranged slots 28 receiving radially-movable chasers29 having ,their inner ends formed with cutting-teeth 30, and theirouter ends provided with bevels 31 for co-action with beveled notches 32located within the forward end fof the sleevelike operating-member 22,which is slidably mounted upon the forward end of the VChaser-carryingmember 21.

Each of the chasers 29 is provided, near its'outer end, with arearwardly-extending pin 33, engaged by a plunger 34 normally urgedoutward by a spring 35, the ysaid plunger and spring being located in aradial bore 36 formed in the chasser-'carrying `member 21, andintercommunicating with the radial slots 28 aforesaid.

At its'rear end, the sleeve-like operatingmember 22 isinternally-threaded for the reception of the externally-threaded,tubular, forward end of an adjusting-ring 37, virtual-ly forming a partof the said operating-member, and sliding upon the mountingmember 20,the flanged rear end of the said ring lbeing provided vwith radialwrenchr100 sockets 38 for thev application of an ordinary Spannerwrench, by means `of which the ring is turned inward or outward asdesired, with respect to the operating-member 22, so as to change theposition of the beveled notches 105 32 therein, with respect to thelocln'ng-member 23, whereby the diameter of the threads out by thechasers may be varied.

The forward face of the flanged rear end of the adjusting-ring 37 Visprovided with 110 an annular series of circular, shallow seats ordepressions 39, with any one of which a friction-plunger is normallyengaged for'preventing the-accidental rotation, by the jarring of thefixture when in'use, of the ring 37 with respect to the operatingmember22, which is formedwith a bore 4l for the reception of the said plunger40, and also for the reception of the spring 42, by means of which thesame is operated.

-For preventing the relative rotation of the chaser-'carrier 2l and themountingmember v2O,A without interfering with their relative,rectilinear movement, the mounting-member 2O is formed at its forwardend with two oppositely-located, integral coupling-'lugs 43, embracingthe' straight sides of avcoupling-boss 44 formed between the main bodyof the Chaser-carrying member 21 and the shank 27 thereof. Y

Y For preventingthe relative rotation of the Chaser-carrying member 21and the operating-member 22 without interfering with their'relat'ive,rectilinear movement, we em-A ploy two locking-pins 45, driven into andprojecting forwardly from an annular bear# ing-rib 46v formed wit-hinthe operatingmember 22 and entering sockets 47 in the Chaser-carrier,yas shown in Fig. 7. i f

To provide for the rectilinear, reari'vard movement of theoperating-member 22, with respect to the Chaser-carrying member 2l, forthe purpose yof permitting the chasers to move into their openpositions, under the normal urOe of their springs 35, we employ springs48, locateddiametrically opposite each other in registered bores 49 and50, respectively formed in the said members 2l and 22, as shown in Fig.8. Each spring l48 encircles a guide-pin V51 mounted in theChaser-carrier 2l and extending rearwardly therefrom, through its bore49, and partway into theV correspending` bore 50 in the operating-member22.

For .locliingthe. operating-member in its closed or thread-cuttingposition, as shown in Fig. 3, against the counter-urge of the` springs48, just described, we .employ the segmental locking-member 23, beforementioned, the samebeing located in aforwardly-inclined.,V substantiallysemi-circumferential slot 52, formed in the 'mounting-member 20, asclearly shown in 17 and 18. This locking-.member is formed, at its rearend, with a segmental, external locking-rib 53, the forward edge ofwhich co-acts with the `forivard wall of a shallow, circumferential,internal locking-groove 54 formed in the vad iustingring 37,`,as showninv Figs. 13 and l14.; ANear its forward end, the said lockingmember isformed with a segmental, internal coupling-rib 55, entering acorresponding coupling-groove 56 (Figs. 15 and 16)V :in the .shank 27 ofthe Chaser-,carrying member, whereby the saidy loclringanemberlocking-member 28 is concurrently moved rearward and outward forthe'reentrance of its locking-rib 5 3 into the groove 54. For thispurpose, the said member is formed with a beveled, rear face 59, whichcoacts with the rear wall 6() of the said inclined slot 52.

The rearward and outward movement of the locl {ing-member, forre-setting the fixture, is effected by means of a resetting handle 6lrocking on a pin 62 in a clearancepassage 63 in the operating-member22,'the spherically-contoured inner end V6.4 of Ythe said lever passingthrough a clearancepassage 65 in the mounting-member 20, into the socket66 in the shank 27 of the Chaser` carrying member2l.

For limiting the vchaser-opening movement of the. operating-member 22,we employ a plunger 67 mounted in a bushing 68 screwed into theoperating-member 22, and at its inner end'entering an elongated recess69 formed in the periphery of the mountingmember 20, and having, at its'rea.rrend, a hardened abutment-pin 7 O, against rwhich the inner end ofthe plunger 67 impinges, the plunger being normally held in the recess69 by a spring 7l located within the bushing 68. yFor the retract-ion ofthe plunger from the recess 69 to permit the operating-member to moveinto its Chaser-removal-and-replacef ment position, it is Vprovided witha lnurled button 72.

Under the above described construction and arrangement of parts, itwillbev seen that while the mounting-member, the chasercarrying memberand the operating-member are held against relative rotary movement, theChaser-carrying and -chaser-operating members have relative, rectilinearmovement with respect to each other, as well as` with respectto themounting-member, this being one of the characteristic features of ourimproved, non-rotary, self-opening die-head.

In the use of our improved die-head, the work represented by brokenlines 73 is rotated in the usual manner, while the'nonrotary die-head isbodily movedtoward the work, on the axial line thereof, by the turretl25, or by whatever other fixture the die-head may be mounted in, thedie-head being, at

this time, re-set and locked, with its chasers in their cuttingpositions. The cutting edges of the chasers now engaged with the workand begin the cutting operation, during which, as it will be understood,the die-head' is manually urged t-oward the work, with more or lesspressure, as required. lVhen the desired lengthof thread has been cutinthe work, the forward movement of the diehead is stopped, either by anabutment on the machine or by the deliberate act of the operator. The.parts of the die-head will now be in the positions in which they areshown in Fig. 3.

The work continuing to rotate, on account of being threaded into thechasers, will pull the Chaser-carrying member toward it in a rectilinearpath, away Vfrom the mountingmember, for a slight distance. YAt the sametime, the operating-member will Vbe correspondingly moved in arectilinear path. due to the fact that at this time it isfpositivelycoupled with the Chaser-carrying member by the locking-member 23, whichextends between the two members. Y Concurrently with this rectilinearmovement -of the said two members, the locking-member is being posi!tively moved bodily inward, as'well as lforward, so that, at thetermination of the concurrent, rectilinear movement of the two members,the locking-member has been so far moved bodily inward that the forwardedge of itslocking-rib 53 will be disengaged from the forward wall ofth-e shallow groove 54 in the operating-member, as shown in Fig. 4. 'Atthe instant the said disengagement takes place, the operating-springs 48assert themselves' to eifect the rearward, rectilinear movement of theoperating-mem# ber, independently of the Chaser-carrying member and themounting-member, until the plunge-r 67 strikes the hardened stop-pin 70,whereby the Chaser-springs 35 are permitted to move the chasers 29radially outward and so release them from engagement with the work 73.tion shown in 5, vith the re-setting `handle 6l rearwardly inclined.`

The die-head being'now disengaged from the work, it is bodily retired,and a newv chaser-carrving member 21 provides one of the jtwo fulera ofthe refsetting lever 6l, the chaser-carr}.ung member ull be urgedrearward in a rectilinear path, at the tsameltime The parts will now bein the posithe operating-member Vis being moved forward in a rectilinearpath by the handle. Therefore, at the instant the forward edge of thelocking-rib 53 registers with the forward wall of the' shallow groove54, the Chaser-carrier vwill move slightly rearward in a rectilinearpath, whereb i the lockingmember will have its rear ace 59 forcedagainst the rear wall 60 of the slot 52, with the effect of positivelymoving the lockingmember outward, as well as rearward, so as to causeits locking-rib 53 to enter the slot 54. In this last phase, thelocking-member moves from the position shown in Fig. 4 to the positionshown in Fig. 3.

The die-head now having been re-set, is advanced as before to the work,and tbe cycle of operations above detailed repeated.

lVe claim: y

l. A die-head having a mounting-member provided with a slot inclinedwith respect to its axis and having parallel walls, a chaser-carryingmember, chasers mounted therein, a Chaser-operating member, and alocking-member therefor located inthe said inclined slot and havingmovement therein in the inclined plane thereof, said chaser-oper-- atingand rhaser-carrying vmembers having` l relative, rectilinear movementwith respect to each other and with respect to the said having amounting-member provided with ar slot inclined with respect Yto its axisand lhaving parallel walls, a Chaser-carrying member, chasers mountedtherein, a chaseroperating member, and a locking-member located in thesaid inclined 'slot and having movement therein vin the inclined planethereof, the said Chaser-carrying and chaser-operating members havingrelative rectilinear movement with respect to each other and withrespect to the said mounting-member, and the locking-member beinginterposed between the Chaser-carrying and chaseroperating members, soas to be moved for unlocking the die-head by the forward draft imposedupon I the Chaser-carrying member bythe work and. moved for loclo ingthe die-head bythe reverso movement of the said Chaser-carryingmemben 3.A non-rotary, self-opening die-bead, having a mounting-member providedwith a slot inclined with respect to its axisa Chaser-carrying memberslidably mounted in the mounting-member. a Chaser-operatingmemberslidably mounted upon the said chaser-cariying` member, and a lockingmember vfor the said Chaser-operating member, having movement in thesaid inclined slot in the inclined plane thereof and positioned betweenthe said Chaser-carrying member and the Chaser-operating' member, thesaid chaser-carryingv and Chaser-.operatiup,- members having` relative,rectilinear movement with respect to each other and with respect to themounting-member, and the said locking-memberbeing moved for unlocking'the die-head by the forward draft imposed upon the chasers by the work.

1l. A non-rotary, self-opening die-head, having` a mounting-memberprovided with slot inclined with respect to its axis, a Chaser-carryingmember, chasers `mounted therein, a Chaser-operating` member, anadjusting-member carried by the chaseroperatine; member at the rear endthereof, and a locking-member for the said chaseroperating` member,located in the said inclined slot and positioned between theChaser-carrying' member and the chaseroperating member and having);bodily movement in the said inclined slot in the plane thereof, ,theVsaid Chaser-carrying' chaser-operatinpj members having' relative,

yrectilinear movement with respect to each other and with respect to thesaid mountingmember, and the said locking-membei1 being'r moved forunlocking the die-head by the forward draft imposed upon the chasers bythe work.

A non-rotary, self-opening die-head, having' a mounting-member providedwith a slot inclined with respect to its axis, a Chaser-carrying membercarried thereby, chasers mounted therein, a Chaser-operating' membermounted upon the vsaid mountingmember, an adjusting-ring carried by theChaser-operating; member at the rear` end thereof, and riding; upon thesaid mountingmember, and a locking-member for the saidcl'iaser-operating member, located in the said inclined slot, positionedbetween the said Chaser-carrying` and chaser-operating members, andbodily moved in the inclined plane of the said slot by the relativemovement between the. said mounting-member and the said Chaser-carrying;member, the said Chaser-carrying and operating-meml'iers having'relative, rectilinear movement with respect to each other and withrespect to the mounting-member, and the said lockingmember being movedfor unlocking the diehead as the result of the forward draft imposedupon the chasers by the work.

6. A non-rotary, self-opening' die-head,V

having a mounting-member provided with a slot inclined with respect toits axis, a chaser-carrying` member carried by the said mounting-memberand slidingJ therein, chasers mounted in the said Chaser-carryin grmember, a Chaser-operating member, and

a, locking-member therefor, located in the said inclined slot, havingbodily movement andV therein and extending between the Vsaid,Chaser-carrying` and Chaser-operating members, and having relative,rectilinear move'- ment with respect to yeach other and with respect tothe said mounting-member, and the said locking-member being moved forunlocking the die-headA as the result of the forward draft imposed uponthe chasers by the work. c.

7. A non-rotary, self-opminey die-head, having a mounting-member, aChaser-carrying' member mounted (hereinand provided with a peripheralcoupling-groove, chasers carriedby the said Chaser-carrying member, aChaser-operating membersliding upon the 80 said mounting-member andhaving a lock-j ing-groove, and a locking-member for thev saidChaser-operating member, extending between the Chaser-carrying andchaseroperatinginembers, and having,` anginternal rib co-acting with thesaid coupling-groove. in the chaser-carrying member, and an eX- ternalrib cio-acting;` with the locking-groove in the said Chaser-operatingmember, the said Chaser-carrying and operating' members having'relative, rectilinear movement with respect to each other and withrespect to the mounting-member, and the said locking'- member beingrdisengaged from one of the members with which it engages as the 27e-95sult of the outward draft imposed upon the chasers by the work.

8. A non-rotary, self-opening die-head, having a mounting-memberprovided with a slot inclined with respect to its aXis and having'parallel walls, a Chaser-carrying member, chasers mounted therein, achaseroperating member. a locking-member for the said Chaser-operatingmember, locatedl in the said slot and positioned betweenthe saidChaser-carrying member and Chaser-operating member, which latter haverelative, rectilinear movement with respectto each other and withrespect to the'mountingmember` and the said locking-member having bodilymovement inthesaid inclined slot in a. plane inclined'with respect tothe v axis of the die-head for unlocking thediehead as the result of the.forward draft imposed upon the chaser-operating member by the work, anda ire-settingr lever extendiingYK between the Operating-member and theChaser-carrying' member for effecting their relative, reverserectilinear movement, whereby the locking-member is moved into positionfor locking the chasers in their closed positions.

9. A non-rotary, self-opening die-head, having' a 'mounting-i'nemberprovided with" an inclined slot havingouter and inner walls. achaser-carrying` member mounted i in the said mounting-meinherq chasersmounted in thevsaid chaser-carrying meA ber, a Chaser-operating 'membenand a locking-member for the said Chaser-operistv f ating member,located in the said slot, and extending between the said Chaser-carryingand Chaser-operating members, the said Chaser-carrying andcha-ser-operating members having relative, rectilinear movement withrespect to each other and with respect to the mounting-member, and thesaid locking-member being bodily m'oved forwardly and inwardly, andrearwardly and outwardly, by the outer and inner walls of the inclinedslot in which it is located, for locking and unlocking the fixture.

l0. A non-rotary, self-opening die-head, having a mounting-memberprovided with a slot inclined with respect to its axis, aChaser-carrying member, chasers mounted therein, a Chaser-operatingmember, a Chaser-adjusting member carried thereby at th-erear endthereof and formed with a locking-abutment, and a locking-member for theChaser-operating member, located in the said inclined slot and havingbodily movement therein in the plane thereof and co-acting with the saidabutment of the adjusting-member for maintaining the chasers in theircutting positions, and the said chaser-carrying and chaser-operatingmembers having relative, rectilinear movement with respect to each otherand with respect to the said mounting-member, and the saidlocking-member being moved for unlocking the die-head by the forwarddraft imposed upon the chasers by the work.

ll. A non-rotary, self-opening die-head, having a mounting-memberprovided with a substantially semi-circumferential slot extendingbetween its inner and outer peripheries and inclined with respect to itsaxis and having parallel walls, a chasercarrying member, chasers mountedtherein, a chaser-operating member, and a segmental locking-membertherefor located in the said inclined slot and having bodily movementtherein in the inclined plane thereof, and the said chaser-operating andChaser-carrying members having relative, rectilinear movement withrespect to each other and with respect to the said locking-member, andthe ripheral coupling-groove, chasers carried by the saidChaser-carrying member, a chaseroperating member-provided with alockingahutment, and a segmental locking-member located in the saidinclined slot and having bodily movement therein and provided with asegmental coupling-rib entering the. peripheral coupling-groove in theChaser-carrying member, and with a segmental locking-rib co-acting withthe locking-abutment aforesaid of the Chaser-operating member.

13. A non-rotary, self-opening die-head having a mounting-memberprovided with a tubular shank and with a slot inclined "f with respectto its axis, a chaser-carrying member having a tubular shank enteringthe said tubular shank ofthe mountingmember, chasers mounted in the saidchasercarrying member, a chaser-operating sleeve sliding upon the saidmounting-member, and a segmental locking-member located in the saidinclined slot and having bodily movement therein in the inclined planethereof and interposed between the said Chaser-carrying andoperating-members and coupled with the Chaser-carrying member and havingintermittent engagement, according to the position thereof, with thechaser-operating member for holding the same in the chaser-closingposition.

In testimony whereof, we have signed this specification.

ALBERT F. BRE'ITENSTEIN. ERVALD A. BARTEIT.

